Python's traceroute feature makes it easy to implement with Scapy templates, and it's intuitive to output routed images.Here is a description of the code that modifies the Python automated operations: technology and best practices.#!/usr/bin/evnpython#-*-coding:utf-8-*-importtimeimportlogging,warningsimport Subprocessimportsocket#eclipse Pydev prompt Unresolve, but normal operation fromscapy.allimport traceroute
Detailed description of the linuxtraceroute command: displays the path from the data packet to the host. Syntax: traceroute [-dFlnrvx] [-f] [-g...] [-I] [-m] [-p] [-s] [-t] [-w] [host name or IP address] [packet size] supplementary instructions: the traceroute command allows you to track the route of network data packets. the default data packet size is 40 Bytes.
Principles of Ping and Traceroute (5)
(Reference) TCP/IP explanation, Volume 1: Protocol
The name "ping" comes from the sonar positioning operation. The purpose is to test whether another host can arrive. The program sends an ICMP echo request packet to the host, and waits for the returned ICMP echo response.
Generally, if you cannot ping a host, you cannot Telnet or FTP to the host. In turn, if you cannot
Application of ICMP--tracerouteTraceroute is an important tool to detect the routing between host and destination hosts, and is also the most convenient tool. As mentioned earlier, although the Ping tool can also detect, however, because of the IP header limit, ping can not be fully recorded under the router. So the traceroute just fills this flaw.The principle of trace
1. traceroute can be used to query routes from one host to another.
2. Principles
PingProgramA record routing option is provided, but not all hosts support this option, and the IP header option field can only store up to nine IP addresses. Therefore, it is necessary to develop traceroute.Traceroute uses the TTL fields of the ICMP message and
returns an ICMP inaccessibility packet, and sets the combination of the type and code in the packet to port inaccessibility. The Traceroute program generates ICMP error packets by using port unavailability.
In addition, in most cases, an ICMP error message is generated when an error occurs when an IP datagram is transmitted, but the following situations do not cause an ICMP error message:
* ICMP error mess
(IP(dst=,ttl=)/TCP(dport=(,),flags=*.*^ packets, got answers, remaining
Iii. TCP traceroute
Traceroute: used to track the path from the starting point to the destination. With Traceroute, we can know the path of information from your computer to the host on the other end of the Internet. Of course, the path for each
-time interactive mode of MTR.
-C num--defines the number of traces, each of which is 1s, and-c must be used with-R, by default 10 times.
Examples of Use:(1) Real-time display mode of MTR[Plain]View PlainCopy
MTR 202.108.33.94
(2) MTR's reporting model[Plain]View PlainCopy
[Email protected] ~]# mtr-r 202.108.33.94
FOCUS9097 snt:10 loss% last AVG best Wrst StDev
220.181.61.252 0% 6.8 3.3 1.8 7.4 2.2
220.181.17.217 0% 0.4 0.5 0.4 0.7 0.1
220.181.16.17 0% 0.6 0.5
The Traceroute tool is used to track the transmission path of datagrams: When a datagram travels from one computer to another, it passes through multiple gateways, and the traceroute command can find all the routers on the datagram transmission path. The transmission path traced through the Traceroute tool is just one of the many pathways between the two computer
Common Linux Network Tools: traceroute for Route Scanning
The previous two articles "common Linux Network Tools: fping host scanning" and "common Linux Network Tools: hping advanced host scanning" are about host scanning, this article describes traceroute and mtr, a common route scanning tool in Linux.
Route scanning mainly queries the number of Route hops from the local host to another host and the data de
Common Linux Network Tools: traceroute and linuxtraceroute for Route Scanning
The previous two articles "common Linux Network Tools: fping host scanning" and "common Linux Network Tools: hping advanced host scanning" are about host scanning, this article describes traceroute and mtr, a common route scanning tool in Linux.
Route scanning mainly queries the number of Route hops from the local host to another
Command name: PingFunction: Test network connectivityCommand path:/bin/pingUsage: ping [-c] IP addressParameters:-C specify number of times to sendCommand name: ifconfigFunction: View and set network card information (temporary settings)Command path:/sbin/ifconfigUsage: ifconfig [NIC name] [IP Address]Example:Ifconfig eth0 192.168.1.1Command name: tracerouteFunction: Displays the path between the packet and
I. Overview:
By default, ASA does not respond to TTL exceeded packets, so Traceroute/tracert does not see the ASA device, and Traceroute/tracert cannot traverse the firewall because of firewall policy restrictions.
Two. Basic ideas:
Depending on how the Traceroute/tracert is handled, determine why it is not possible to traverse the firewall, thereby releasing
Port is)-P prot--protocol=prot use raw Packet of protocol prot for Tracerou Ting--mtu Discover MTU along the path being traced. Implies '-f-n 1 '--back Guess the number of hops in the backward path and print if it differs-v--version print version info and exit--help Read this Help and exitCommon Command DisplayMulti-Command useTraceroute-n-M 5-q 4-w 3 www.baidu.com
Description:-n Display IP address, do not check host nam
Objective: To learn the usage of Linux command Ping,tracerouteUsage of 1:ping:Mans PingPing: Determine if a host is respondinglinux-8o9i:~ #Ping-C4 119.29.29.29PING119.29.29.29(119.29.29.29) About( -) bytes of data. -Bytes from119.29.29.29: icmp_seq=1Ttl=Wuyi Time=101Ms -Bytes from119.29.29.29: icmp_seq=2Ttl=Wuyi Time=75.0Ms -Bytes from119.29.29.29: icmp_seq=3Ttl=Wuyi Time=74.4Ms -Bytes from119.29.29.29: icmp_seq=4Ttl=Wuyi Time=74.2Ms---119.29.29.29 PingStatistics---4Packets Transmitted,4Rec
Android.view.view;import Android.widget.edittext;import android.widget.textview;/** can not understand the annotation I eat half a kilo of dog food:-) */public class Mainactivity extends actionbaractivity {private EditText et_cmd;private String app_path;private TextView tv_result; @Overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (r.layout.home_activity); * Initialize Control */et_cmd = (EditText) Findviewbyid (r.id.et_cmd); tv_res
Role:A router, gateway that looks at which IP addresses the packet passed through during transmission.Working principle:First send a TTL of 1 UDP packets to the remote host, according to the protocol, the router receives the packet, the TTL value minus 1, when the TTL is 0, the router discards the packet, and sends the sender back an ICMP packet, the packet contains the router's own IP address. Similarly, t
The previous two articles "Linux Common Network Tools: Fping host Scan" and "Linux common Network Tools: hping Advanced Host Scan" are all about the host scan, this article introduces the common route scanning tools traceroute and MTR.A route scan is primarily a query for the number of hops and data delays that are routed to another host.Traceroute Basic Use
The principle of the route scanning tool is the time to live (TTL) to achieve. Each time
traceroute the principle of:1.traceroute host to be Trace Host Send UDP The destination port is a port with a large number (for example, 33434 Port)2. First package ttl= 1 Span style= "Font-family:simsun;" lang= "ZH-CN" xml:lang= "ZH-CN", dport=33434 ; future packet ttl 1 3. How to determine that you have reached your destination,general destinations are not UDP 33434 this large port to open wha
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